Contractor changes/overages question

[Ray S.]

If my contractor has to redo some work because they didn't do it to code. For example, let's say they used plastic pipes somewhere and the inspector comes and tells them they need to replace them with copper. Or they didn't have enough clearance somewhere and have to reframe a closet or wall. Issues like that where they need to make a change to work they did because of feedback from an inspector. Who pays the overages? My project has been completed and now my contractor is trying to charge me for all these overages. I never received a change order, they just proceeded with the work.